Crescent FRR4 4 Piece 3/8-Inch to 9/16-Inch 72 Tooth Reversible Ratcheting Combination Wrench Set 4 piece SAE set contains 3/8", 7/16", 1/2" & 9/16" sizes These wrenches feature a narrow cross section design for increased versatility and are made from mirror finished chrome vanadium steel for maximum strength, durability and corrosion resistance. Sets come in an easy access textured plastic carrying case with snap fit closure.